Saw National Treasure yesterday. Pretty entertaining if you suspend your disbelief and go with the flow. I have only one nit to pick (assuming you let all the other monstrous nits go by): when Sean Bean and Co try to find out what 'Stowe' means, they go to Yahoo.com and type 'Stowe declaration of independence'! Haven't these guys heard of Google?
It could be just me, but I think there were some subtle barbs at the Bush administration as well (when Nicholas Cage reverently reads aloud a sentence from the Declaration of Independence about it being the responsibility of good men to act when they see something wrong happening, for example) .